JP6939745B2 - Vehicle parking lock device - Google Patents

Description

The present invention relates to a vehicle parking lock device, and more particularly to a structure of a parking gear.

A parking gear provided on a rotating member connected to a drive wheel and a lock claw that can mesh with the parking gear are formed, and a locked state in which the lock claw and the parking gear mesh with each other and the lock claw and the parking gear It has a lock pole that is rotated between unlocked states and a lock cam that is inserted between the position fixing member and the lock pole, and the lock cam is attached to the rotation axis of the parking gear. A vehicle parking lock device including a cam mechanism that rotates the lock pole by moving in parallel with the lock pole is known. For example, the vehicle parking lock device described in Patent Document 1. In the vehicle parking lock device described in Patent Document 1, the lock claw and the parking gear are engaged with each other to be in a locked state, so that the rotation of the rotating member integrally provided with the parking gear is stopped. NS.

Japanese Unexamined Patent Publication No. 2009-143363

By the way, in the vehicle parking lock device described in Patent Document 1, when the driver operates the parking lock, for example, the shift lever is operated to the parking position, the rotation of the rotating member connected to the drive wheel is stopped. The vehicle parking lock device is locked in order to allow the vehicle to be locked. However, in the vehicle parking lock device described in Patent Document 1, for example, the shift lever is moved to the parking position, that is, the parking position by the parking lock operation, for example, while the vehicle is running or the vehicle is not completely stopped. In this case, the parking gear and the lock claw are meshed with each other in a state where the torque remains in the rotating member, for example, in a state where the torque is input to the rotating member and the vehicle is rotating. As a result, for example, the torsional torque of the power transmission mechanism is input from the parking gear to the lock pole having the lock claw, so that the frictional force between the parking gear and the cam mechanism increases and the load during the shift operation is increased. There was a possibility that the reoperation load of the so-called shift lever would increase.

The present invention has been made in the context of the above circumstances, and an object of the present invention is to provide a rotating member when the vehicle parking lock device is locked while torque remains in the rotating member. It is an object of the present invention to provide a parking lock device for a vehicle provided with a parking gear capable of releasing the remaining torque.

The gist of the first invention is that a parking gear provided on a rotating member connected to a drive wheel and a lock claw that can be meshed with the parking gear are formed, and the lock claw and the parking gear mesh with each other. It has a lock pole that is rotated between the state and the unlocked state in which the lock claw and the parking gear are disengaged, and a lock cam that is inserted between the position fixing member and the lock pole. A vehicle parking lock device including a cam mechanism that rotates the lock pole by moving the lock cam in parallel with the rotation axis of the parking gear, wherein the parking gear is attached to the lock claw. A parking lock gear having meshing outer peripheral teeth and rotating around the rotation axis, and a parking lock gear base fixed to the rotating member so as to be relatively rotatable around the rotation axis with respect to the parking lock gear. A space that expands and contracts in the circumferential direction with the relative rotation of the parking lock gear and the parking lock gear base is formed between the parking lock gear and the parking lock gear base, and an elastic body is formed in the space. It is to be provided in a preloaded state.

The gist of the second invention is that, in the first invention, the elastic body has one end in the circumferential direction in contact with the parking lock gear and the other end in the circumferential direction in contact with the parking lock gear base. To be there.

The gist of the third invention is that, in the first or second invention, the elastic body is provided between the rotating member and the outer peripheral teeth in the radial direction of the parking gear.

The gist of the fourth invention is that in the first or third invention, the elastic body is a spring.

The gist of the fifth invention is that, in the first invention or the fourth invention, the parking lock gear is formed with a groove portion extending in the circumferential direction and penetrating in the rotation axis direction, and the parking lock gear base is formed. Is small in the circumferential direction with respect to the groove portion, and a protrusion that can be inserted into the groove is formed, and the protrusion is inserted into the groove between the parking lock gear and the parking lock base to form the groove. And the space surrounded by the protrusion is formed.

According to the vehicle parking lock device of the first invention, the parking gear includes a parking lock gear having outer peripheral teeth that mesh with the lock claw and rotating around the rotation axis, and a parking lock gear around the rotation axis with respect to the parking lock gear. A parking lock gear base fixed to the rotating member so as to be relatively rotatable, and a relative rotation of the parking lock gear and the parking lock gear base between the parking lock gear and the parking lock gear base. A space that expands and contracts in the circumferential direction is formed, and an elastic body is provided in the space in a preloaded state. As a result, when the torque is input to the rotating member, that is, the torque remains in the rotating member, and the lock claw and the parking gear are engaged with each other in a locked state, the torque remains in the rotating member. The torque is released by the elastic body provided in the space and is suppressed from being input to the lock claw from the parking gear, so that an increase in the operating load of the shift lever can be suppressed, for example.

According to the second invention, one end of the elastic body in the circumferential direction is in contact with the parking lock gear, and the other end in the circumferential direction is in contact with the parking lock gear base. As a result, the torque remaining on the rotating member can be more reliably released by the elastic body.

According to the third invention, the elastic body is provided between the rotating member and the outer peripheral teeth in the radial direction of the parking gear. As a result, the torque remaining on the rotating member by the elastic body can be more reliably released between the rotating member and the outer peripheral teeth.

According to the fourth invention, the elastic body is a spring. Thereby, the torque remaining in the rotating member can be released between the rotating member and the outer peripheral teeth by the cheaper component.

According to the fifth invention, the parking lock gear is formed with a groove portion extending in the circumferential direction and penetrating in the rotation axis direction, and the parking lock gear base is smaller in the circumferential direction with respect to the groove portion. A protrusion that can be inserted into the groove is formed, and the space is formed between the parking lock gear and the parking lock gear base by inserting the protrusion into the groove and being surrounded by the groove and the protrusion. Will be done. As a result, since the space is formed between the parking lock gear and the parking lock gear base with a simple structure, it is possible to suppress an increase in the size of the parking gear.

It is a skeleton diagram explaining the main part of the vehicle to which this invention is applied. It is the schematic explaining the structure of the parking lock device for a vehicle provided in the transmission of FIG. FIG. 2 is a cross-sectional view showing a main part of the parking gear of FIG. 2, and is a cross-sectional view of III-III of FIG. It is a front view which shows the main part of the parking gear of FIG. 3, and is the IV-IV sectional view of FIG. It is a perspective view of the parking lock device for a vehicle of FIG. 2, and is an enlarged view which shows a part of the parking lock device for a vehicle enlarged. It is the schematic explaining the structure of the parking lock device for a vehicle of another Example of this invention. FIG. 6 is a cross-sectional view showing a main part of the parking gear of the embodiment of FIG. 6, and is a cross-sectional view of VII-VII of FIG. It is sectional drawing which shows the main part of the parking gear of another Example of this invention.

Although the present invention is applied to an engine-driven vehicle, the present invention includes only an electric motor as a driving force source, such as a hybrid vehicle having a traveling rotating machine, that is, a driving electric motor, in addition to the engine as a driving force source for traveling. It can also be applied to electric vehicles and the like. As the power transmission device for a vehicle, a horizontal transaxle such as an FF (front engine / front drive) in which a plurality of shafts are arranged along the vehicle width direction is preferably used, but an FR type or a four-wheel drive type is preferably used. It may be a power transmission device of.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following examples, the drawings are appropriately simplified or deformed, and the dimensional ratios and shapes of each part are not necessarily drawn accurately.

FIG. 1 is a skeleton diagram illustrating a main part of a vehicle 10 to which the present invention is applied. The vehicle 10 includes an engine 14 that functions as a driving force source for traveling, a driving wheel 38, and a power transmission device 12 provided between the engine 14 and the driving wheel 38. The power transmission device 12 was input to a torque converter 16 as a fluid transmission device connected to the engine 14, an input shaft (not shown) connected to the torque converter 16 to transmit power from the engine 14, and the input shaft. It includes an output shaft 32 that outputs power, a differential gear device 34 connected to the output shaft 32, and the like. In the power transmission device 12 shown in FIG. 1, the drive torque generated by the engine 14 functioning as a driving force source is a torque converter 16, a transmission 18, an output shaft 32, a differential gear device 34, and a pair of axles. It is transmitted to the left and right drive wheels 38 via 36.

The vehicle 10 is provided with an electronic control device 40 corresponding to a control device that controls the output of the engine 14 and the shift control of the transmission 18. The electronic control device 40 includes, for example, a so-called microcomputer provided with a CPU, a RAM, a ROM, an input / output interface, and the like, and the CPU follows a program stored in the ROM in advance while using the temporary storage function of the RAM. Various controls of the vehicle 10 are executed by performing signal processing.

Various input signals detected by various sensors included in the vehicle 10 are supplied to the electronic control device 40. For example, based on detection signals by engine rotation speed sensor 50, input shaft rotation speed sensor 52, output shaft rotation speed sensor 54, accelerator opening sensor 56, throttle opening sensor 58, brake operation amount sensor 60, shift position sensor 62, and the like. , Engine rotation speed Ne (rpm), input shaft rotation speed Nt (rpm) which is turbine rotation speed Nt (rpm), output shaft rotation speed Nout (rpm) corresponding to vehicle speed V (km / h), accelerator opening θacc (%), Throttle valve opening degree θth (%), brake operation amount θbrk (%) indicating the magnitude of the driver's deceleration operation, operation position Psh of the shift lever 64 provided in the vehicle 10, and the like are supplied. NS. Further, the electronic control device 40 controls the engine output control signal Se for output control of the engine 14, the hydraulic control command signal Sp for hydraulic control such as shifting of the transmission 18, and the switching of the shift range. The shift command signal Ss and the like are output respectively. The hydraulic control command signal Sp is, for example, an engagement command signal for operating a solenoid valve (not shown) for switching the gear stage of the transmission 18, and is output to the hydraulic control circuit 66. The shift command signal Ss is output to the shift actuator 68.

The shift lever 64 is arranged near the driver's seat, for example, and can be selectively moved to the P position, the R position, the N position, the D position, and the S position as shown in FIG. The P position is, for example, set to a neutral state, that is, a neutral state in which the power transmission path in the transmission 18 is released, that is, the power transmission in the transmission 18 is cut off, and is mechanically set by the vehicle parking lock device 80 in the transmission 18. This is a parking position for blocking the rotation of an output gear (not shown) of the transmission 18 so-called locking. The R position is, for example, a reverse traveling position for rotating the output gear (not shown) of the transmission 18 in the reverse direction. The N position is a neutral position for setting the neutral state in which the power transmission in the transmission 18 is cut off. The D position is, for example, a forward traveling position in which automatic transmission control is executed using all forward gear stages in a shift range, that is, a shift range that allows shifting of the transmission 18. The S position is, for example, a forward traveling position in which manual shifting is possible by switching between a plurality of types of shifting ranges that limit the range of change of gear stages, that is, a plurality of types of shifting ranges having different gear stages on the high vehicle speed side.

FIG. 2 is a schematic view illustrating the configuration of the vehicle parking lock device 80. The vehicle parking lock device 80 includes a parking gear 82 provided on an output shaft 32 of a rotating member, for example, a transmission 18, which is connected to a drive wheel 38. Further, the vehicle parking lock device 80 includes a lock pole 86 having a lock claw 84 that meshes with the parking gear 82, and a cam mechanism 88 that rotates the lock pole 86. That is, in the vehicle 10, the lock pole 86 is rotated by the cam mechanism 88, and the lock claw 84 of the lock pole 86 and the parking gear 82 mesh with each other, so that the rotation of the output shaft 32 is prevented. The state in which the lock claw 84 and the parking gear 82 are engaged is the locked state of the vehicle parking lock device 80, and the state in which the lock claw 84 and the parking gear 82 are not engaged is the unlocked state of the vehicle parking lock device 80. be. The locked state of the vehicle parking lock device 80 is, for example, a parking lock instruction based on the driver's parking lock instruction, that is, a lock instruction based on the operation of the shift lever 64, and is performed when the shift lever 64 is moved to the parking position by the driver. NS. FIG. 2 shows a locked state in which the lock claw 84 of the lock pole 86 is engaged with the parking gear 82.

FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, which is a cross-sectional view showing a main part of the parking gear 82. As shown in FIG. 3, the parking gear 82 includes a parking lock gear 92 having outer peripheral teeth 90 that mesh with the lock claw 84 and rotating relative to the output shaft 32 around the rotation axis C1 of the output shaft 32, and the output shaft 32. It is configured to include a parking lock gear base 94 that is fixed and rotates around a rotation shaft C1 so as to be relatively rotatable with respect to the parking lock gear 92. The parking lock gear 92 is shown by omitting a part of the outer peripheral shape as shown by the alternate long and short dash line in FIG. 2, but as shown in FIG. 4 described later, a plurality of outer peripheral teeth 90 are formed at equal intervals. .. In the parking gear 82, the parking lock gear 92 and the parking lock gear base 94, which are formed in a substantially disk shape, are overlapped adjacent to each other in the thickness direction, that is, in the rotation axis C1 direction. The parking gear 82 is rotated around the output shaft 32 as the output shaft 32 rotates, for example.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. As shown in FIGS. 3 and 4, the parking lock gear 92 is formed with an arcuate groove 96 extending in the circumferential direction and opening on one side surface 92a. The groove 96 is formed so as to penetrate the parking lock gear 92 in the thickness direction of the parking lock gear 92. A plurality of groove portions 96 are formed in the circumferential direction of the side surface 92a at predetermined intervals, and in this embodiment, a total of two groove portions 96 are formed at substantially equal intervals in the parking lock gear 92. The parking lock gear 92 is formed with a bottomed circular first recess 98 that opens on one side surface 92a around the rotation axis C1. The convex portion 112 formed on the parking lock gear base 94 is fitted into the first concave portion 98. The groove 96 is formed between the first recess 98 and the outer peripheral teeth 90 in the radial direction of the parking lock gear 92. The groove 96 has a predetermined length in the radial direction of the parking lock gear 92 between the root of the outer peripheral tooth 90 and the first recess 98, and extends in the circumferential direction along a rotation circle around the rotation axis C1, for example. It opens on the side surface 92a in a substantially fan shape. The parking lock gear 92 is formed on the other side surface 92b with a bottomed second recess 100 that is larger in the radial direction than the opening of the groove 96 formed in the side surface 92a and extends in the circumferential direction to open. The second recess 100 is formed so as to communicate with the groove 96.

As shown in FIG. 3, the parking lock gear base 94 has a circular protrusion that fits into the first concave portion 98 on one side surface 94a, that is, on the side surface 94a on the parking lock gear 92 side in a state of being adjacent to the parking lock gear 92. Part 112 is formed.

An arc-shaped protrusion 102 that can be inserted into the groove 96 is formed on the side surface 94a of the parking lock gear base 94. A plurality of projecting portions 102 are formed so as to be insertable into the groove portion 96 at predetermined intervals in the circumferential direction of the side surface 94a, and in this embodiment, a total of two projecting portions 102 are formed on the parking lock gear base 94 at substantially equal intervals. There is. The protrusion 102 has a predetermined length in the radial direction of the parking lock gear base 94 along the groove 96, and has a substantially fan shape extending in the circumferential direction along a rotation circle around the rotation axis C1, for example. The parking lock gear base 94 is formed so as to project in the thickness direction. The protruding portion 102 is formed so that the outer peripheral portion of the protruding portion 102 is on the inner peripheral side of the parking lock gear base 94, that is, on the inner peripheral side of the outer peripheral side of the parking lock gear base 94. The length of the protrusion 102 in the thickness direction is formed to be equal to the length from the side surface 92a of the parking lock gear 92 to the bottom surface 100a of the second recess 100. That is, when the protrusion 102 is inserted into the groove 96 and the side surface 92a and the side surface 94a are brought into contact with each other, the front end surface 102a and the bottom surface 100a of the protrusion 102 are at equal positions in the rotation axis C1 direction.

The protruding portion 102 is formed with a female screw hole 102b that is open to the tip surface 102a and has a predetermined depth. The depth of the female screw hole 102b is formed so as to be smaller than, for example, the length of the protruding portion 102 in the thickness direction. A bolt 104 inserted from the second recess 100 is screwed into the female screw hole 102b via, for example, a washer 106. The washer 106 is interposed between the head portion of the bolt 104, the bottom surface 100a of the second recess 100, and the tip surface 102a of the protrusion 102. Further, the washer 106 used is smaller in the radial direction than the opening of the second recess 100. Therefore, the parking lock gear 92 and the parking lock gear base 94 are fixed by bolts 104 and can slide with each other, and the parking lock gear 92 and the parking lock gear base 94 can rotate relative to each other. ..

As shown in FIGS. 2 and 4, the parking lock gear base 94 is cut out on both sides of the protrusion 102 in the circumferential direction in a groove shape in the thickness direction of the parking lock gear base 94. Notches 114 are formed. The protrusion 102 is formed so as to be smaller in the circumferential direction with respect to the groove 96. Specifically, the length of the outer periphery of the groove 96 is notched on both sides of the protrusion 102 and the protrusion 102 in the circumferential direction. It is substantially the same as the total outer circumference length of 114, and the inner circumference length of the groove 96 is substantially the same as the total inner circumference length of the protrusion 102 and the notches 114 on both sides of the protrusion 102 in the circumferential direction. It has become. When the protrusion 102 is inserted into the groove 96, a space S surrounded by the three wall surfaces including the peripheral wall surface 96a of the groove 96 and the peripheral end surface 102c of the protrusion 102 is formed in the groove 96. NS. The space S is formed in the groove 96, that is, in the parking lock gear 92. In this embodiment, by inserting the protrusion 102 into the groove 96, spaces S are formed in the groove 96 on both sides of the protrusion 102 in the circumferential direction. In this embodiment, the spaces S are formed at a total of four locations. An elastic body 108, for example, a coiled spring 108 is arranged in the space S in a preloaded state. One end of the spring 108 is in contact with the circumferential wall surface 96a of the groove 96, that is, the parking lock gear 92, and the other end of the spring 108 is the circumferential end surface 102c of the protrusion 102, that is, the parking lock gear base 94. It is arranged so as to come into contact with. As shown in FIGS. 2 and 4, the space S is formed between the output shaft 32 and the outer peripheral teeth 90 in the radial direction of the parking gear 82, that is, the radial direction of the parking lock gear 92. That is, the spring 108 is provided between the output shaft 32 and the outer peripheral teeth 90 in the radial direction of the parking gear 82.

In this embodiment, the parking lock gear 92 is provided on the output shaft 32 so as to be relatively rotatable, the parking lock gear base 94 is provided on the output shaft 32 so as not to be relatively rotatable, and the parking lock gear 92 is provided so as to be relatively rotatable. Therefore, the space S is expanded and contracted in the circumferential direction with the relative rotation of the parking lock gear 92 and the parking lock gear base 94. By expanding and contracting the space S, the spring 108 arranged in the space S is also expanded and contracted.

Returning to FIG. 2, the vehicle parking lock device 80 has a control lever 120 that is rotated in conjunction with the operation of the shift lever 64 and a control shaft 122 that rotates in response to the operation of the shift lever 64 via the control lever 120. And a manual valve lever 124 that is fixed to the control shaft 122 so as not to rotate relative to each other and is rotatably provided around the axis of the control shaft 122. A cam mechanism 88 is connected to the manual valve lever 124. As shown in FIG. 2, in the lock pole 86 provided in the vehicle parking lock device 80, the base end portion 86a is rotatably supported by the lock pole shaft 136, and the tip end portion 86b is slidably contacted with the lock cam 128. A lock claw 84 for engaging with the outer peripheral teeth 90 is provided substantially in the center in the longitudinal direction.

The cam mechanism 88 has a lock cam 128 inserted between the position fixing member 126 and the lock pole 86, a base end portion connected to a manual valve lever 124, and a lock cam 128 attached to the tip end portion to form a rotation axis. It is provided with a lock rod 130 that can move in parallel with C1. FIG. 5 is a perspective view of the vehicle parking lock device 80, which is an enlarged view showing a part of the vehicle parking lock device 80 in an enlarged manner. As shown in FIG. 5, the lock cam 128 is formed in a substantially conical shape having a tapered cam surface, and the diameter becomes smaller toward the tip end side of the lock rod 130. The lock rod 130 is formed in an L shape. On the lock rod 130, a cam spring 132 that urges the lock cam 128 in the direction from the large diameter side to the small diameter side of the diameter of the lock cam 128, that is, in the direction of arrow A shown in FIG. 5, is provided between the lock cam 128 and the spring receiver 134. It is inserted. The lock rod 130 is operated by the manual valve lever 124 that rotates with the rotation of the control shaft 122 in response to the operation of the shift lever 64, for example, when the shift lever 64 is operated to the P position of the parking position by the driver. It is moved along the direction of arrow A via. FIG. 5 shows a state in which the lock claw 84 of the lock pole 86 is not meshed with the parking gear 82.

For example, when the shift lever 64 is moved to the parking position by a parking lock instruction by the driver, the lock cam 128 is pushed in the direction of arrow A, the lock pole 86 is pushed up in the direction of arrow B, and the lock pole shaft is turned counterclockwise around the lock pole shaft 136. It is rotated to. In the vehicle parking lock device 80, as shown in FIG. 2, the lock pole 86 is rotated by the lock cam 128, so that the lock claw 84 and the outer peripheral teeth 90 of the parking lock gear 92, that is, the lock claw 84 and the parking gear 82 Will be in a locked state. Further, the lock pole 86 is constantly urged by the return spring 138 in the direction in which the lock claw 84 and the parking gear 30 are disengaged, that is, in the direction opposite to the arrow B direction.

By the way, in the vehicle parking lock device 80, for example, when the shift lever 64 is moved to the parking (P) position while the vehicle 10 is running or before the vehicle 10 is completely stopped, torque is applied to the output shaft 32. In the remaining state, for example, in a state where torque is input to the output shaft 32, the lock claw 84 of the lock pole 86 and the parking gear 82 are meshed with each other. In this embodiment, for example, when the lock claw 84 of the lock pole 86 and the parking gear 82 are meshed with the torque remaining on the output shaft 32, the torque is applied between the output shaft 32 and the outer peripheral teeth 90. A spring 108 arranged in the space S of the above space allows the spring 108 to escape between the output shaft 32 and the peripheral teeth 90, that is, between the output shaft 32 and the parking lock gear 92. Therefore, the vehicle parking lock device 80 can suppress the torque from being input from the parking gear 82 to the lock pole 86.

As described above, according to the vehicle parking lock device 80 of the present embodiment, the parking gear 82 includes a parking lock gear 92 having outer peripheral teeth 90 that mesh with the lock claw 84 and rotating around the rotation axis C1, and a parking lock gear 92. A parking lock gear base 94 fixed to an output shaft 32 so as to be relatively rotatable around the rotation axis C1 is included, and a parking lock gear 92 and a parking lock gear 92 are provided between the parking lock gear 92 and the parking lock gear base 94. A space S that expands and contracts in the circumferential direction with the relative rotation of the parking lock gear base 94 is formed, and a spring 108 is provided in the space S in a preloaded state. As a result, when torque is input to the output shaft 32, that is, when torque remains in the output shaft 32 and the lock claw 84 and the parking gear 82 are engaged with each other, the lock claw 84 remains in the output shaft 32. The torque is released by the spring 108 provided in the space S and is suppressed from being input to the lock claw 84 from the parking gear 82, so that an increase in the shift operation load can be suppressed, for example. Further, since the torque remaining on the output shaft 32 is released by the spring 108 provided in the space S, it is compared with the case where the vehicle parking lock device 80 is unlocked while the torque remains on the output shaft 32, for example. Therefore, it is possible to suppress the generation of abnormal noise when the engagement between the parking gear 82 and the lock pole 86 is released, and it is possible to suppress the wear of the parking gear 82 and the lock pole 86 due to the engagement.

Further, according to the vehicle parking lock device 80 of the present embodiment, the spring 108 has one end in the circumferential direction in contact with the parking lock gear 92 and the other end in the circumferential direction in contact with the parking lock gear base 94. There is. As a result, the torque remaining on the output shaft 32 can be more reliably released by the spring 108.

Further, according to the vehicle parking lock device 80 of the present embodiment, the spring 108 is provided between the output shaft 32 and the outer peripheral teeth 90 in the radial direction of the parking gear 82. As a result, the torque remaining on the output shaft 32 by the spring 108 can be more reliably released between the output shaft 32 and the outer peripheral teeth 90.

Further, in the vehicle parking lock device 80 of the present embodiment, by using an elastic body arranged in the space S as a spring, the torque remaining on the output shaft 32 by cheaper parts is applied to the output shaft 32 and the outer peripheral teeth. It can escape between 90 and 90.

Further, according to the vehicle parking lock device 80 of the present embodiment, the parking lock gear 92 is formed with a groove 96 extending in the circumferential direction and penetrating in the rotation axis C1 direction, and the parking lock gear base 94 is formed with a groove 96. A protrusion 102 that is smaller in the circumferential direction than the groove 96 and can be inserted into the groove 96 is formed, and the protrusion 102 is inserted into the groove 96 between the parking lock gear 92 and the parking lock gear base 94 to form the groove 96. And a space S surrounded by the protrusion 102 is formed. As a result, the space S is formed between the parking lock gear 92 and the parking lock gear base 94 with a simple structure, so that it is possible to suppress an increase in the size of the parking gear 82.

Next, another embodiment of the present invention will be described. The same reference numerals are given to the parts common to the above-described first embodiment, and the description thereof will be omitted.

FIG. 6 is a schematic view illustrating the configuration of the vehicle parking lock device 200 of another embodiment of the present invention. FIG. 7 is a sectional view taken along line VI-VII of FIG. 6, which is a sectional view showing a main part of the parking gear 202. The parking gear 202 includes a parking lock gear 204 rotatably provided on the output shaft 32 and a parking lock gear base 206 rotatably provided on the output shaft 32 and rotatably on the parking lock gear 204. It is configured with and.

The parking lock gear 204 has a predetermined length in the radial direction of the parking lock gear 204 and has a substantially fan shape extending in the circumferential direction along a rotation circle around the rotation axis C1, for example. An arcuate projecting portion 208 projecting in the thickness direction is formed. The protrusion 208 has a parking lock gear 204 and a parking lock gear base 206 adjacent to each other in the thickness direction, that is, the rotation axis C1 direction, and overlaps the parking lock gear 204 on one side surface 204a in the thickness direction of the parking lock gear 204. It is formed so as to protrude from the side surface 204a on the parking lock gear base 206 side. A plurality of projecting portions 208 are formed at predetermined intervals in the circumferential direction of the side surface 204a, and in this embodiment, a total of two projecting portions 208 are formed on the parking lock gear 204 at substantially equal intervals.

The parking lock gear base 206 is formed with an arcuate groove 210 that is cut out in a part of the outer circumference in the thickness direction. A plurality of groove portions 210 are formed in the circumferential direction of the parking lock gear base 206 at predetermined intervals, and have a predetermined length in the radial direction of the parking lock gear base 206, for example, a rotating circle around the rotation axis C1. It is formed in a substantially fan shape extending in the circumferential direction along the outer circumference. The groove portions 210 are formed so that projecting portions 208 can be engaged with each other in the groove portions 210, and in this embodiment, a total of two groove portions 210 are formed on the parking lock gear base 206 at substantially equal intervals. The groove 210 is formed so as to be larger in the circumferential direction with respect to the protrusion 208, and a space S is formed in the circumferential direction between the groove 210 and the protrusion 208. The space S is formed on both sides of the protruding portion 208 in the circumferential direction, and a spring 108 is provided inside.

As shown in FIG. 7, the parking lock gear base 206 has female screw holes 212 having a predetermined depth opened on the side surface 206a on the parking lock gear 204 side at predetermined intervals in the circumferential direction of the parking lock gear base 206. A plurality of bolts 104 are formed so as to be separated from each other, and bolts 104 formed on the parking lock gear 204 are screwed together via, for example, a washer 106. In this embodiment, a total of two are formed on the parking lock gear base 206 at substantially equal intervals.

As described above, according to the vehicle parking lock device 200 of the present embodiment, the parking lock gear 204 is formed with a protrusion 208, and the parking lock gear base 206 is formed with a groove 210. A space S is formed between the parking lock gear base 206 and the parking lock gear base 206. By providing the spring 108 in the space S, for example, when the vehicle parking lock device 200 is locked while the torque remains in the output shaft 32, the torque remaining in the output shaft 32 is used in the space S. It can be released by a spring 108 provided inside. Further, since the space S is formed between the parking lock gear 204 and the parking lock gear base 206 with a simple structure, it is possible to suppress an increase in the size of the parking gear 82.

FIG. 6 is a cross-sectional view showing a main part of the parking gear 302 of another embodiment of the present invention, and is a cross-sectional view corresponding to FIG. 3 of the first embodiment and FIG. 7 of the second embodiment. As shown in FIG. 8, the parking gear 302 is provided with a parking lock gear 304 provided on the output shaft 32 so as to be relatively rotatable, and a parking lock gear 304 provided on the output shaft 32 so as to be relatively non-rotatable and relatively rotatable on the parking lock gear 304. It is configured to include a parking lock gear base 306.

As shown in FIG. 8, the parking lock gear 304 includes a ring-shaped ring portion 308 on which outer peripheral teeth 90 are formed, and a main body portion 310 provided on the inner peripheral side of the ring portion 308. There is. An arc-shaped groove 96 is formed in the ring portion 308, and the groove 96 is formed so that the arc-shaped protrusion 102 formed in the parking lock gear base 306 can be inserted. The ring portion 308 is provided on the main body portion 310 so as to be relatively non-rotatable.

As described above, according to the vehicle parking lock device 300 of the present embodiment, the parking lock gear 304 is configured to include the ring portion 308 and the main body portion 310. Therefore, for example, the shape of the parking lock gear 304 is free. Since the degree can be increased, the degree of freedom in design can be improved.

In this embodiment, the main body 310 is provided in the ring portion 308 so as to be relatively non-rotatable. For example, the main body 310 is provided in the ring portion 308 so as to be relatively rotatable and is provided in the parking lock gear base 306 so as not to be relatively rotatable. It may have been. In this case, the parking lock gear 304 provided with the ring portion 308 is provided on the output shaft 32 so as to be relatively rotatable, and the parking lock gear base 306 is provided on the output shaft 32 so as to be relatively non-rotatable.

Although a preferred embodiment of the present invention has been described in detail with reference to the drawings, the present invention is not limited to this, and is also carried out in still another embodiment.

For example, in the above-described embodiment, the spring 108 is provided in the space S, but it may be an elastic body such as rubber.

Further, in the above-described embodiment, the female screw hole 102b into which the bolt 104 fixing the parking lock gear 92 and the parking lock gear base 94 is screwed is formed in the protruding portion 102 of the parking lock gear base 94. However, the present invention is not limited to this, and for example, the female screw hole 102b may be formed in the parking lock gear 92. In this case, the bolt 104 is inserted from the parking lock gear base 94.

Examples of the present invention have been described in detail with reference to the drawings, but the above is only one embodiment, and other examples are not given. It can be implemented with various changes and improvements based on knowledge.

10: Vehicle 32: Output shaft (rotating member)
38: Drive wheels 80, 200: Vehicle parking lock devices 82, 202, 302: Parking gear 84: Lock claw 86: Lock pole 88: Cam mechanism 90: Outer teeth 92, 204, 304: Parking lock gears 94, 206, 306: Parking lock gear base 96, 210: Groove 102, 208: Projection 128: Lock cam C1: Rotation axis S: Space

Claims (5)

A parking gear provided on a rotating member connected to a drive wheel and a lock claw that can mesh with the parking gear are formed, and a locked state in which the lock claw and the parking gear mesh with each other and the lock claw and the parking gear It has a lock pole that is rotated between unlocked states and a lock cam that is inserted between the position fixing member and the lock pole, and the lock cam is attached to the rotation axis of the parking gear. A vehicle parking lock device including a cam mechanism that rotates the lock pole by moving in parallel with the lock pole.
The parking gear includes a parking lock gear having outer peripheral teeth that mesh with the lock claw and rotating around the rotation axis, and parking fixed to the rotating member so as to be rotatable relative to the parking lock gear around the rotation axis. Including the lock gear base,
A space is formed between the parking lock gear and the parking lock gear base so as to expand and contract in the circumferential direction with the relative rotation of the parking lock gear and the parking lock gear base.
A vehicle parking lock device characterized in that an elastic body is provided in the space in a preloaded state. The vehicle parking lock device according to claim 1, wherein one end of the elastic body is in contact with the parking lock gear and the other end of the elastic body is in contact with the parking lock gear base. .. The vehicle parking lock device according to claim 1 or 2, wherein the elastic body is provided between the rotating member and the outer peripheral teeth in the radial direction of the parking gear. The vehicle parking lock device according to any one of claims 1 to 3, wherein the elastic body is a spring. The parking lock gear is formed with a groove portion that extends in the circumferential direction and penetrates in the direction of the rotation axis.
The parking lock gear base is formed with a protrusion that is smaller in the circumferential direction with respect to the groove and can be inserted into the groove.
Claim 1 is characterized in that when the parking lock gear and the parking lock base are adjacent to each other, the protrusion is inserted into the groove to form the space surrounded by the groove and the protrusion. A parking lock device for a vehicle according to any one of 4 to 4.

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